org.apache.storm.opentsdb.bolt

Class OpenTsdbBolt

java.lang.Object

org.apache.storm.topology.base.BaseComponent

org.apache.storm.topology.base.BaseRichBolt

org.apache.storm.opentsdb.bolt.OpenTsdbBolt

All Implemented Interfaces:

Serializable, IBolt, IComponent, IRichBolt

public class OpenTsdbBolt
extends BaseRichBolt

Basic bolt implementation for storing timeseries datapoints to OpenTSDB.

List of OpenTsdbMetricDatapoint is generated for each tuple with the configured tupleOpenTsdbDatapointMappers. All these datapoints are batched till the given batchSize or flushIntervalInSeconds is reached.

Example topology:

 OpenTsdbClient.Builder builder = OpenTsdbClient.newBuilder(openTsdbUrl).sync(30_000).returnDetails(); final OpenTsdbBolt openTsdbBolt = new OpenTsdbBolt(builder, Collections.singletonList(TupleOpenTsdbDatapointMapper.DEFAULT_MAPPER)); openTsdbBolt.withBatchSize(10).withFlushInterval(2).failTupleForFailedMetrics(); topologyBuilder.setBolt(“opentsdb”, openTsdbBolt).shuffleGrouping(“metric-gen”); 

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
OpenTsdbBolt(OpenTsdbClient.Builder openTsdbClientBuilder, ITupleOpenTsdbDatapointMapper tupleOpenTsdbDatapointMapper)
OpenTsdbBolt(OpenTsdbClient.Builder openTsdbClientBuilder, List<? extends ITupleOpenTsdbDatapointMapper> tupleOpenTsdbDatapointMappers)

Method Summary

Modifier and Type	Method and Description
void	cleanup() Called when an IBolt is going to be shutdown.
void	declareOutputFields(OutputFieldsDeclarer declarer) Declare the output schema for all the streams of this topology.
void	execute(Tuple tuple) Process a single tuple of input.
OpenTsdbBolt	failTupleForFailedMetrics() When it is invoked, this bolt acks only the tuples which have successful metrics stored into OpenTSDB and fails the respective tuples of the failed metrics.
Map<String,Object>	getComponentConfiguration() Declare configuration specific to this component.
void	prepare(Map stormConf, TopologyContext context, OutputCollector collector) Called when a task for this component is initialized within a worker on the cluster.
OpenTsdbBolt	withBatchSize(int batchSize)
OpenTsdbBolt	withFlushInterval(int flushIntervalInSeconds)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OpenTsdbBolt

public OpenTsdbBolt(OpenTsdbClient.Builder openTsdbClientBuilder,
                    ITupleOpenTsdbDatapointMapper tupleOpenTsdbDatapointMapper)

OpenTsdbBolt

public OpenTsdbBolt(OpenTsdbClient.Builder openTsdbClientBuilder,
                    List<? extends ITupleOpenTsdbDatapointMapper> tupleOpenTsdbDatapointMappers)

Method Detail

withFlushInterval

public OpenTsdbBolt withFlushInterval(int flushIntervalInSeconds)

withBatchSize

public OpenTsdbBolt withBatchSize(int batchSize)

failTupleForFailedMetrics

public OpenTsdbBolt failTupleForFailedMetrics()

When it is invoked, this bolt acks only the tuples which have successful metrics stored into OpenTSDB and fails the respective tuples of the failed metrics.

Returns:

same instance by setting failTupleForFailedMetrics to true

prepare

public void prepare(Map stormConf,
                    TopologyContext context,
                    OutputCollector collector)

Description copied from interface: IBolt

Called when a task for this component is initialized within a worker on the cluster. It provides the bolt with the environment in which the bolt executes.

This includes the:

Parameters:

stormConf - The Storm configuration for this bolt. This is the configuration provided to the topology merged in with cluster configuration on this machine.

context - This object can be used to get information about this task’s place within the topology, including the task id and component id of this task, input and output information, etc.

collector - The collector is used to emit tuples from this bolt. Tuples can be emitted at any time, including the prepare and cleanup methods. The collector is thread-safe and should be saved as an instance variable of this bolt object.

execute

public void execute(Tuple tuple)

Description copied from interface: IBolt

Process a single tuple of input. The Tuple object contains metadata on it about which component/stream/task it came from. The values of the Tuple can be accessed using Tuple#getValue. The IBolt does not have to process the Tuple immediately. It is perfectly fine to hang onto a tuple and process it later (for instance, to do an aggregation or join).

Tuples should be emitted using the OutputCollector provided through the prepare method. It is required that all input tuples are acked or failed at some point using the OutputCollector. Otherwise, Storm will be unable to determine when tuples coming off the spouts have been completed.

For the common case of acking an input tuple at the end of the execute method, see IBasicBolt which automates this.

Parameters:

tuple - The input tuple to be processed.

cleanup

public void cleanup()

Description copied from interface: IBolt

Called when an IBolt is going to be shutdown. There is no guarentee that cleanup will be called, because the supervisor kill -9’s worker processes on the cluster.

The one context where cleanup is guaranteed to be called is when a topology is killed when running Storm in local mode.

Specified by:

cleanup in interface IBolt

Overrides:

cleanup in class BaseRichBolt

declareOutputFields

public void declareOutputFields(OutputFieldsDeclarer declarer)

Description copied from interface: IComponent

Declare the output schema for all the streams of this topology.

Parameters:

declarer - this is used to declare output stream ids, output fields, and whether or not each output stream is a direct stream

getComponentConfiguration

public Map<String,Object> getComponentConfiguration()

Description copied from interface: IComponent

Declare configuration specific to this component. Only a subset of the “topology.*” configs can be overridden. The component configuration can be further overridden when constructing the topology using TopologyBuilder

Specified by:

getComponentConfiguration in interface IComponent

Overrides:

getComponentConfiguration in class BaseComponent